I'm not sure how many of you will see this, but here it goes... I imagine you're asking yourself "do I want this game?" and having second thoughts after reading a handful of negative reviews about how "dead" the community is.
This, DOESN'T MATTER. there are active players and they will be enough, trust me. In the brevity of time I spent on the game it consumed me. It was the only thing on my mind until I accidently killed myself and walked away.
I was always checking if someone had attacked me, had they succeded, improving my defenses, repairing damage done. It is incredibly addicting, you have been warned.
Within two weeks I had spent 77 hours on this game, it may have been just one week... I can't really remmeber. I would have Castle Doctrine open on the side while I played other games, checking every time I finished a game of League of Legends or Hearthstone. Had I been attacked? What happened?
The message I'm trying to tell you is that while there might not be too many people running around, they are there, and you should be afraid. Just because you're not online doesn't mean you can't be attacked. As well as the fact that this game can be insanely addicting, (it was for me).
... Oh god writing this review... I've been drawn back in.
*Edit* The game is always hardcore, you die, you start over from scratch. The game isn't afraid to drop you on your head and let your brain spill out. You died verifying your own defenses? Start from scratch, died trying to rob someone? Start from scratch, somebody killed your family, stole all your possesions, and now you have no reason to live? Suicide and enjoy starting off with a new family. a new safe, an empty house, and 2k (scratch, square one, however you want to say it).